Friday, June 22, 2007
Block diagram Description
Block diagram Description
The Figure shows Block Diagram of patient monitoring system. As name indicates the project is related to biomedical Instrumentation.Different blocks are explained as follows:-
PULSE MEASUREMENT
The sensor consists of a light source and photo detector; light is shone through the tissues and variation in blood volume alters the amount of light falling on the detector. The source and detector can be mounted side by side to look at changes in reflected light or on either side of a finger or earlobe to detect changes in transmitted light. The arrangement consist of an infra red light emitting diode and a matched photo detector.
ROOM TEMPERATURE MEASUREMENT
Here sensor used for temperature detection is Lm 35 which is precision integrated temperature sensor whose output voltage is linearly proportional to Celsius temperature.
The signal sensed from this IC is signal conditioned & send to microcontroller for display on screen.
Fire detector
To detect the temperature rise due to fire, a thermistor is used as sensor. The reason for using thermistor is the steep rise in resistance with rise in temperature.
EMERGENCY DIALLING
When Pulse rate is abnormal the microcontroller directly dials a set telephone number. Telephone Dialing is accomplished using relay transistor logic. The message is stored in voice recorder IC which is called upon by microcontroller in emergency situation and sent to concerned person through telephone line.
LCD DISPLAY
LCD 2 x 16 line decoder display is used for displaying various messages from sensors like pulse rate, Temperature.
MAX 232
The MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communications interfaces, particularly applications where ±12V is not available. These parts are especially useful in battery-powered systems, since their low-power shutdown mode reduces power dissipation to less than 5µW. The MAX225,MAX233, MAX235, and MAX245/MAX246/MAX247 use no external components and are recommended for applications where printed circuit board space is critical.
1. Superior to Bipolar
2. Operate from Single +5V Power Supply
3. +5V and +12V—MAX231/MAX239
4. Low-Power Receive Mode in Shutdown
5. Meet All EIA/TIA-232E and V.28 Specifications
6. Multiple Drivers and Receivers
7. 3-State Driver and Receiver Outputs
8. Open-Line Detection (MAX243)
The Figure shows Block Diagram of patient monitoring system. As name indicates the project is related to biomedical Instrumentation.Different blocks are explained as follows:-
PULSE MEASUREMENT
The sensor consists of a light source and photo detector; light is shone through the tissues and variation in blood volume alters the amount of light falling on the detector. The source and detector can be mounted side by side to look at changes in reflected light or on either side of a finger or earlobe to detect changes in transmitted light. The arrangement consist of an infra red light emitting diode and a matched photo detector.
ROOM TEMPERATURE MEASUREMENT
Here sensor used for temperature detection is Lm 35 which is precision integrated temperature sensor whose output voltage is linearly proportional to Celsius temperature.
The signal sensed from this IC is signal conditioned & send to microcontroller for display on screen.
Fire detector
To detect the temperature rise due to fire, a thermistor is used as sensor. The reason for using thermistor is the steep rise in resistance with rise in temperature.
EMERGENCY DIALLING
When Pulse rate is abnormal the microcontroller directly dials a set telephone number. Telephone Dialing is accomplished using relay transistor logic. The message is stored in voice recorder IC which is called upon by microcontroller in emergency situation and sent to concerned person through telephone line.
LCD DISPLAY
LCD 2 x 16 line decoder display is used for displaying various messages from sensors like pulse rate, Temperature.
MAX 232
The MAX220–MAX249 family of line drivers/receivers is intended for all EIA/TIA-232E and V.28/V.24 communications interfaces, particularly applications where ±12V is not available. These parts are especially useful in battery-powered systems, since their low-power shutdown mode reduces power dissipation to less than 5µW. The MAX225,MAX233, MAX235, and MAX245/MAX246/MAX247 use no external components and are recommended for applications where printed circuit board space is critical.
1. Superior to Bipolar
2. Operate from Single +5V Power Supply
3. +5V and +12V—MAX231/MAX239
4. Low-Power Receive Mode in Shutdown
5. Meet All EIA/TIA-232E and V.28 Specifications
6. Multiple Drivers and Receivers
7. 3-State Driver and Receiver Outputs
8. Open-Line Detection (MAX243)
Sunday, May 27, 2007
abstract
ABSTRACT
The heart is so well protected from outside danger, monitoring the heart can be a challenge. Medical scientists have several ways of "seeing" the heart without actually having to open the chest. Typically, open heart surgery is performed only as the last resort. To monitor the heart, a doctor begins by touching the chest. If the tip of the heart can be felt pushing against the chest, the heart may be enlarged. Thumping lightly on the chest gives an idea of the heart's shape. Your body's vital statistics also tell how well the heart is working. Next, the doctor places the stethoscope on the chest to hear the sound of the heart. Your pulse is the rate at which your heart beats. “Your pulse is usually called your heart rate, which is the number of times your heart beats each minute (bpm)”. As your heart pumps blood through your body, you can feel a pulsing in some of the blood vessels close to the skin's surface, such as your wrist, neck, or upper arm. Counting your pulse rate is a simple way to find out how fast your heart is beating.Your doctor will usually check your pulse during a physical examination or in an emergency. You can check your pulse the first thing in the morning, just after you wake up but before you get out of bed. This is called a resting pulse. Some people like to check their pulse before and after they exercise. Regarding above we are designing the sytem which can be useful at home as well as at hospital. The simple design and easy operation allows individuals to monitor the heartbeat during exercise and workouts. The device provides great safety to individuals with known heart problems. The readings of pulse meters are accurate enough when they count from your finger at normal body temp. As this system is designed for home purpose, it includes Room temperature measurement; a fire detector & a special feature for hospital use that Emergency Calling via phone line.
The heart is so well protected from outside danger, monitoring the heart can be a challenge. Medical scientists have several ways of "seeing" the heart without actually having to open the chest. Typically, open heart surgery is performed only as the last resort. To monitor the heart, a doctor begins by touching the chest. If the tip of the heart can be felt pushing against the chest, the heart may be enlarged. Thumping lightly on the chest gives an idea of the heart's shape. Your body's vital statistics also tell how well the heart is working. Next, the doctor places the stethoscope on the chest to hear the sound of the heart. Your pulse is the rate at which your heart beats. “Your pulse is usually called your heart rate, which is the number of times your heart beats each minute (bpm)”. As your heart pumps blood through your body, you can feel a pulsing in some of the blood vessels close to the skin's surface, such as your wrist, neck, or upper arm. Counting your pulse rate is a simple way to find out how fast your heart is beating.Your doctor will usually check your pulse during a physical examination or in an emergency. You can check your pulse the first thing in the morning, just after you wake up but before you get out of bed. This is called a resting pulse. Some people like to check their pulse before and after they exercise. Regarding above we are designing the sytem which can be useful at home as well as at hospital. The simple design and easy operation allows individuals to monitor the heartbeat during exercise and workouts. The device provides great safety to individuals with known heart problems. The readings of pulse meters are accurate enough when they count from your finger at normal body temp. As this system is designed for home purpose, it includes Room temperature measurement; a fire detector & a special feature for hospital use that Emergency Calling via phone line.
Monday, May 21, 2007
Patient Monitoring System
We have a project for final year instrumentation engg, on Biomedical instrumentation.
which includes
1. sensing pulse rate
2. room temp
2. automatically emergency calling via telephone to Doctor in abnormal condition
4. body temp.
please give Ur suggestion on this, also include if any project available.
which includes
1. sensing pulse rate
2. room temp
2. automatically emergency calling via telephone to Doctor in abnormal condition
4. body temp.
please give Ur suggestion on this, also include if any project available.
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